This is a dark photo of a species of Asian red-bodied swallowtail and probably Atrophaneura kotzebuea AKA Pachliopta kotzebuea. There is a clearer photo of the same species in http://www.zoochat.com/2190/butterfly-id-374878/ and other angles in http://www.zoochat.com/2190/butterfly-id-374877/ http://www.zoochat.com/2190/butterfly-id-374769/